There are many countries where bitcoin is not accepted legally, so how do you use bitcoin in that country? Usually if you raise the level of bitcoin use in that country then you may get into legal trouble.
So how do you use your earned bitcoin in that country.
Given that Bitcoin is completely anonymous, I don't think it's very difficult to use it for different purposes. It may be more difficult to withdraw funds from Bitcoin in some countries and some exchanges, but it is still not possible. But I personally think that the best application of Bitcoin is to keep it as an asset with increasing value.